Informed consent means exactly what it says. You have to know what you are talking about before you can agree with it. If I mke a deal with you, I have to properly explain to you what is in the deal, or better still tell you that you should get your own lawyer explain it to you, before you sign on it.
Some transactions are complicated and the regular Joe Citizen is not expected to understand all the little details on his own. That makes such deals open to abuse by slimers.
Any time somebody asks you to "sign here, here and here," and says "don't worry about the legal crap over here", Don't walk, RUN away from the deal.
If the small print "legal crap" did not need to be there or meant nothing, it would not be in the contract. It is there for a reason and more likely than not, the reason is that you are getting screwed with a capital F.
Read everything, if you don't understand what you are reading, get somebody else who does not have any interest in the contract explain it to you.